Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eb2c8ee46151113e5e5c496ba3958b4d0e158d21625e23e0c480213a4c7966df' 
  AND token = '5VAmJISJUbj5FJXXjz9n1GFhsts0h37MIvnkGjtnXQs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}